only ever heard prioritise/prioritize, and when i put priorize into google it automatically changed it to prioritize, lol. So i guess for me priorize sounds really foreign. Maybe another american vs british thing?

I forgot to mention i think they mean different things. Prioritize means expressing the importance of something, u are making it a priority. priorize is a derivative of prior i am guessing and so expresses precedence at least that is how i think of those two, but im sure someone will come along and tell you what they really mean, haha